Ho model



PATENTED FEB. 16, 1904.

R. DUNNE. MITBR CUTTING MACHINE.

APPLIUATIDI FILED JULY 22, 1902.

3 SHEETS8HEET 1..

H0 MODEL INVENTOR.

WITNESSES:

No. 752,050. PATENIED FEB. 16, 1904.

H. 113mm.

MITER CUTTING MACHINE.

A1IPLIOAL'IIQH FILED JULY 22,1902. R0 MODEL. 3 SHEETS-SHEET 3.

FIG. 6

A 32 3/ WA vK, FIG] FIG. 3

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UNITED STATES .Patented February 16, 1904.

RALPH DUNNE, OF DUNEDIN, NEW ZEALAND.

MITER-CIJTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 752,050, dated February 16, 1904.

Application filed July 22, 1902. Serial No. 116,545. (No model.)

To all whom it may concern:

Be it known that I, RALPH DUNNE, pictureframer, a British subject, residing at George street, Dunedin, Otago, New Zealand,-have' invented certain new and useful Improvements in Miter-Cutting Machines, of which the following is a specification.

The invention relates to miter-cutting machines; and it consists in the features and combination and arrangement of parts hereinafter particularly described, and pointed out in the claims.

In the accompanying drawings, Figure l is a plan View of the invention. Fig. 2 is a front view of part of the invention. Fig. 3 is a sectional viewfrom front to rear of part of the invention at a b, Fig. 1. Fig. 4: is a plan view of part of arm 2, showing details. Fig. 5 is a sectional view at c d, Fig. 1. Fig. 6 is a sectional view of arm 2 at c c, Fig. 4. Fig. 7 is a sectional view of arm 1 at d cl, Fig. 1, showing molding held in place by stop 31. Fig. 8 is a sectional view of bracket 12 at ff, Fig. 1. Fig. 9 is a sectional view of arm 2 at g g, Fig. 1. Fig. 10 is a part elevation of Fig. 9.

In the drawings, 1 and 2 indicate arms having plates 25 and graduated bars 6 combined therewith, said plates and graduated bars forming rests upon which the moldings 1 4 to be out are placed.

These arms 1 and 2 are adapted to be ad-.

having curved slots 22, through which bolts.

23 pass, the bolts having clamping-nuts 24, by

which the segments are clamped inany posi-.

tion to which they may be adjusted, as will be more fully described hereinafter. The extension 12 is secured to the arm 1 permanently. The extension 43 is adjustably secured to arm 2, as is hereinafter more particularly described. Gages 7 7 are employed, one for each arm, secured adj ustably by clamping-nuts 8 to scales 6 on the arms. By sliding these gages along the scales and securing them in the desired position any desired length ofvmolding may be gaged up to the length of the arms 1 and 2. The gages shown in the drawings are adapted for the molding to be cut at an angle of forty-five degrees. For cutting the molding at any other angle these gages are removed and replaced, so that the one takes the place of the other, and then the end of the molding butts up against the apex 34 of the obtuse angle formed by the gages with the arms and scales.

A circular saw is indicated at 5, its position showing that it has cut through the moldings.

The arms 1 and'2, as shown in Fig. 2, are in different horizontal planes, and the extension 42, secured to arm 1, has an upwardly-extending bracket 36, to which the segmental arm 9 is secured adjustably by a bolt or bolts 13, which pass from said segmental arm 9 through a slot 14. in the bracket 36, a clamping nut or nuts 15 (shown in Fig. 1) being employed to clamp the parts together firmly.

This construction enables the segmental arm 9 to be adjusted vertically without moving the arm 1 off from the bench. The segmental arms 9 and 9 are supported by a bracket 12, having arms 37 extending from the ringshaped lower or main portion of bracket 12, upon the upper ends of which arms 37 the segmental arm 9 rests. The segmental arms 9 and 9 are clamped to the said bracket-arms 37 by means of the bolts 23 and nuts 24, said bolts being fixed to the bracket-arms 37 and extending up through the said slots 22. By this means the segmental arms 9 9 may. be held in any position to which they may be adjusted.

One of the arms 38 of the bracket 12 extends vertically, as shown in Fig. 3, and this supports a spindle 0r shaft 11, extending in between the two segmental arms 9 9? and having a beveled pinion 10 thereon meshing with segmental racks 9 9 on the segmental arms 9 and 9*. By this means the adjustment of the segmental arms 9 9 is rendered uniform.

The ring-shaped center of the bracket 12 fits within a ring-shaped base-plate 20. Th isbaseplate 20 forms the base of the apparatus which rests upon the bench 30. The base-plate 20 has two ribs 21, adapted to fit in grooves in the bench, out parallel to the saw, so that the whole apparatus may be moved toward and from the saw to allow different widths of moldings to be out.

The bracket 12, carrying segmental arm 9,

arm 2, and part of segmental arm 9 as far as joint 41 is adjustable vertically by the camring 16, having inclined slots 17, through which bolts 18 extend, the heads of which fit into vetthe bench, excepting arm 1, which remains onthe bench.

There are shown in Fig. 4 a part plan view of arm 2, segmental arm 9, extension 43, scale 6, and the plate 25, which is checked in and secured to arm 2, as shown in Fig. 5 in sectional view at c d, Fig. 4. There are two turned disks 26 at each end of extension 43. Each disk has a slot 27, to which is fitted a block 28, that is made a sliding fit in slot 27 Bolt 29 passes through block'28 and has a nut and washer on its upper side, which secures extension 43 of segmental arm 9 to arm 2 when properly adjusted. The disks 26 are adapted to give arm 2 the forward parallel movement when at any angle to suit the various widths of moldings to be cut and to enable the edges of the upper and lower moldings to meet the saw simultaneously when a circular saw is used. The disks 26 with slots 27, adjusted as shown in Fig. 4, allowa forward parallel movement when the arms 1 and 2 are set at right angles to each other. When the arms 1 and 2 are set at any other angle required, the disks 26 are turned by the thumb-piece 44 until the indicator-hand 45 is pointing to the required angle registered on the graduated scale 46, cut on a raised piece 47 on extension 43 and round disk'26.- The pin 48 is inserted in one of the holes 49 to prevent disks 26 from shifting while the arm 2 is being properly adjusted.

Figs. 9 and 10 illustrate means for support ing the outer end of arm 2. The base 50 has an inclined-plane piece 51 cast upon it with projecting pieces 52 to form guides for the upper part of pedestal 53, which is secured to arm 2 and has a projection-piece 54, which passes up through arm. 2 till flush with the top of arm 2. The pin 55 passes through a hole 56 in the upper part of pedestal 53 and projection-piece 54 into corresponding hole 57 in inclined-plane piece 51 and base 50. Holes, such as 57 and 58, in the inclined-plane piece 51 and base 50 are so pitched that when arm 2 is being adjusted by cam-ring 16, operating bracket 12, the upper part of the pedestal 53 will rise or fall in the same ratio and support the outer end of arm 2 at G G in Fig. 1, parallel with the bench.

The sectional view shown in Fig. 5 through C D of Fig. 4 shows therelation to the bench 30 when arm 2 is elevated to half the distance adjustable by operating bracket 12, as shown in Figs. 2and '3:

In Fig. 7 there is shown aportable stop 31, adapted to slide backward and forward on the plate 25 and secured by the-countersunk bolt 32 after suitable adjustment for supporting molding of particular shape, such as illustrated at 33.

From the above it will be seen that the arms 1 and 2 have a connection between them in the nature of a pivotal one, allowing them to be adjusted to different angular positions, that one of these arms may be adjusted vertically toward and from the bench, and that both arms may be moved together with the supportingbracket toward and from the saw. 7

The arrangement of the parts shown in Figs. 4 and 5 is such that the uppermost piece of molding may he slid forward, so that its edge is cut by a circular saw simultaneously with the cutting of the edge of the lowermost piece of molding.

I do not limit myself to the form of saw, as a band-saw may be used; but when a bandsaw is used working perpendicular to the bench the arrangement of parts mentioned in the last preceding sentence is not required, as the edges of the moldings may beset to meet such a saw simultaneously without such arrangement.

The device may be made with a metal base of its own adapted to fit and be mounted onto a saw-bench instead of being made, as shown in the drawings, with the top of the saw-bench used as the base.

From the above it will be seen that the two pieces are cut so as to fit each other exactly, for if the saw wabbles it will take off of one strip what it'leaves upon theother.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a miter-cutter, a support for one'molding having a supporting-surface to'hold the molding in one plane, a second support having its supporting-surface at all times in another plane parallel to the first and with the second molding crossing the first, said supports being arranged at an angle to each other and a cutter arranged to cut the moldings simultaneously at their point of crossing, substantially as described.

2. In a miter-cutter, a support for one molding having a supporting-surface to hold the molding in one plane, a second support having its supporting-surface at all times in another plane parallel to the first and with the second molding crossing the first, said supports being arranged at an angle to each other and a cutter arranged to cut the moldings simultaneously at their point of crossing, said second molding being adjustable to alter its distance from the plane of the first support whilemaintaining its parallel relation thereto, substantially as described.

3. A miter-cutter comprising two supports having their supporting-surfaces in different but parallel planes and adapted to hold the moldings with their corresponding faces parallel, said supports being arranged at an angle to each other, and a saw, substantially as described.

4:. In combination in a miter-cutting machine, a pair of supports arranged at an angle to each other and in difierent but parallel planes, said supports having rests upon their inner or adjacent sides and cutting means, substantially as described.

5. In combination in a miter-cutting machine, two supports arranged at an angle to each other and in different but parallel planes, said supports having rests to insure holding the molding in similar positions and crossing, whereby when out they will match, and means for altering the angular relation between the supports, substantially as described.

, 6. In a miter-cutter a support for one molding, a second vertically-adjustable support in a higher parallel plane at an angle with said first support for another molding and cutting means, the said supports maintaining at all times positions in different planes, substantially as described.

7 In combination in a machine for cutting miters, a support for one molding, a support for another molding arranged at an angle to the first, said supports having their supporting-surfaces arranged in parallel planes whereby one molding may be made to overlap the other and a saw operating at the plane where the two supports converge, said supports having an adjustable connection between them whereby they may be set in diilerent angular positions, substantially as described.

8. In combination in a miter-cutter arms against which the work is to rest, an adjustable connection between said arms by which they may be set in diiferent angular positions,

adjustable supporting means whereby one of the arms may be moved into a position parallel to its former position, substantially as described.

9. In combination a pair of arms, adjustable segmental arms connecting them and supporting means for said adjustable segmental arms with means for parallel adjustment of said support, substantially as described.

10. In combination a pair of arms, an adjustable connection between them by which they may be set in difierent angular positions,

a support adjustable in parallel for one of the said arms, and a base carrying said adjustable support, said base being adjustable toward and from the saw, substantially as described.

11. In combination a pair of arms, adjustable segmental arms connecting them, a rack-andgear connection between said segmental arms and means for supporting said arms substantially as described.

12. In combination a pair of arms, adjustable segmental arms connecting them, a bracket for supporting the segmental arms having a ringshaped base, an outer ring-shaped main base, an adjusting-cam for the supporting-bracket arranged between the same and the outer base and means for operating the cam substantially as described.

a 13. In combinationapair of arms,adjustable segmental arms connecting them, a bracket for supporting the segmental arms having a ringshaped base, an outer ring-shaped main base, an adjusting-cam for the supporting-bracket arranged between the same and theouter base and means for operating thecam the said cam having inclined slots receiving projections from the adjustable bracket said projections being guided to move vertically in the ringshaped outer base, substantially as described.

14. In combination the two arms provided with plates for affording rests for the moldings to be cut and an adjustable connection between the said arms, said arms being in different horizontal planes whereby the moldings may be placed one-over the other and cut substantially as described.

15. In combination the two'arms provided with plates for afliording rests for the moldings to be cut, an adjustable connection between the said arms, said arms being in different horizontal planes whereby the moldings may be placed one over the other and means for giving one of said arms a forward and backward par allel movement when at any angle to enable the edges of the upper and lower moldings to meet and be cut by a circular saw simultaneously, substantially as described.

16. In combination the two arms provided with plates for afiording rests for the molding to be cut, an adjustable connection between the said arms, said arms being in difierent planes whereby the moldings may be placed parallel to each other, slotted graduated disks adapted to give one arm a forward parallel movement at any angle and means for supporting the outer end of same arm substantially as described.

15. In combination the two arms provided with plates for affording rests for the moldings to be cut and an adjustable connection between said arms, said arms being in different planes whereby the moldings may be placed parallel to each other and cut simultaneously and portable stops adapted to support moldings of a particular desired shape, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

RALPH DUNNE.

Witnesses:

Srnuonn BRENT, J. R. LARK. 

